NGK Spark Plug (Racing) Standard Nickel (Pre-Gap 0.032) 4091 (R5671A-7)

NGK 4091 (R5671A-7) Racing Plug Standard Nickel Gap 031 (0.8mm)

Racing Plug Standard Nickel Gap 031 (0.8mm) NGK 4091 (R5671A-7)

NGK 4091 Spark Plug

NGK Standard Nickel Core Spark Plug (Racing) (Gap 0.031) 5238 (R5671A-9)

NGK Racing Spark Plug Stock 4091 Nickel w/ V-Groove Tip .032in R5671A-7

Champion Spark Plug N2C Spark Plug NEW NOS 905

NGK Spark Plug (Racing) Standard Nickel (Pre-Gap 0.032) 4091 (R5671A-7)